Video Screen Always on

Diagnostic Trouble Code Chart:

Wiring Schematics:

CIRCUIT DESCRIPTION
The Auxiliary Video Module (AVM) controls the operation of the Video Entertainment System (VES). The AVM turns on the VES when the video screen is placed in the down position. The AVM determines when the video screen is in the down position by means of a screen position switch located in the video screen.

The video screen is of a Liquid Crystal Display (LCD) type, and it uses backlighting when the video screen power is on. The video screen turns on when the ignition switch is on and the video screen is in the down position.

The video screen produces images based on this video signal, either coming from the VCP or the auxiliary source of video.

DIAGNOSTIC AIDS
^ Check for the following conditions:
- RED and ORN wires (pair of CKT 40) are either shorted together, or shorted to B+ between the AVM and the video screen
- A faulty video screen
^ An intermittent failure may be very difficult to detect and to diagnose accurately. Faulty electrical connections or wiring causes most intermittent problems. When an intermittent condition is suspected, check the suspected circuits for the following conditions:
- Improperly formed or damaged terminals
- Wire chafing
- Damage to connector bodies

TEST DESCRIPTION
The number(s) below refer to the step number(s) on the diagnostic table.
1. Checks for pair of CKT 40 shorted together (screen position switch circuits).
4. Verifies repairs made to the VES.